Improvement in attachments for lightning-conductors



J. SPRATT.

- Lightning-Rod Insulator.

Patented Feb. 5, 1850.

UNITED STATES PATENT OFFICE) JAMES SPRATT, OF CINCINNATI, OHIO.

IMPROVEMENT IN ATTACHMENTS FOR LIGHTNING-CONDUCTORS.

Specification forming part of Letters Patent No. 7,076, dated February5, 1850.

To all whom it may concern.-

Beitknown that I, JAMES SPRATT, of the city of Cincinnati, county ofHamilton, and State of Ohio, have inventeda new and Improved Attachmentfor Lightning-Conductors; and I do hereby declare that the following isa full and exact description of the construction and operation of mysaid invention, reference being had to the drawings making a part ofthis specification.

The nature of my said invention consists in placing a projection on theside of the isolator at a, as represented in Figure 1, at such distancebelow the shoulder 11 as will allow sufficient space for the eye of theattachment, and the forming of a metallic attachment, as in Figs. 2 and3, Fig. 2 being intended for placing between the joint of a brick, andFig. 3 having a screw cut at the end for inserting into wood. In the eyeof each is an opening, 0 c, of sufficient width to allow the projectiona, on the isolator, Fig. 1, to descend, which, when turned round, bearsagainst the rim D in Figs. 2 and 3, which Ifind of great advantage, moreparticularly when lightning-conductors are run over roofs or flatsurfaces, in which case they are not apt to get displaced. I also form aprojection on the shank of the attachment, next the eye, as shown at ein Figs. 2 and 3,

for the purpose of stopping the projection to on the isolator, Fig. 1,when turned round, so that the isolator will be compelled to make anentire revolution before it can get released from the fastening, whereaswithout the said projection on the metallic fastening, as shown at e,the isolator might get released by moving halt round. Fig. 4 shows aview of the whole mode. I

What I claim herein as new and of my invention, and desire to secure byLetters Patent, is

Forming the eye of the metallic attachment with an opening, 0 c, toallow the passage of a lug, a, on the neck-of the isolator, and so thatthe rod also can be inserted after the attachment is secured to itsplace, when this is combined with a lug on the shank of the attachmentcorresponding to that on the isolator, substantially after the mannerand for the purposes herein set forth-thatis to say, enabling the rod atany time to be inserted or withdrawn Without disturbing the attachmentin the building.

JAMES SPRATT.

Witnesses:

G. G. PERRY, P. J. SULLIVAN.

